REACTIVITY OF DOUBLE THIOUREAS TOWARDS METAL-COMPLEXES - SYNTHESIS AND CRYSTAL-STRUCTURE OF [((MU-H)RU3(CO)9)2(SC(NPH)N(ET)(CH2)2NH(PHN)CS)]

By reaction of PhNCS with (Meo)3Si(CH2)3NH(CH2)2NH2 (2:1 molar ratio), a substituted dithiourea has been obtained which affords a new functi onalized xerogel (XGditu) by hydrolysis and polycondensation with (EtO )4Si. This material is able to bind metal species, giving systems of p otential interest in catalysis. In order to ascertain the nature of th e tethered metal species, the non-siloxanized dithiourea PhNHC(S)N(Et) (CH2)2NHC(S)NHPh (2) has been prepared. It reacts with [Ru3(CO)12] to give the complex {(mu-H)Ru3(CO)9}2(SC(NPh)N(Et)(CH2)2NH(PhN)CS} (4), w hich contains two distinct hydrido carbonyl clusters bound to the two deprotonated thiourea groups.